All Questions
Tagged with capacitance electronics
48
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Capacitance of multiple overlapping metal layers
Consider a set of metal plates arranged in a similar fashion to the picture below:
The capacitance between the layer labeled M5 and the layer labeled M4 can be calculated (ignoring fringe effects) as ...
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Why is potential continuous at dielectric conjunction?
Lets take for an example, a spherical capacitor with two dielectrics. The Electric Field will then be given by $$\frac{Q}{4\pi\varepsilon_0\varepsilon_r r^{2}}$$
We know that then the electric field ...
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Effect of Coaxial Cable Length on Capacitive Discharge
Summary: If I have a Capacitive Discharge through a coaxial cable to some load, how does the length of the cable effect the current felt by the load?
I believe that the schematic breakdown for this ...
-2
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1
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Why we are using coupling capacitor in AC amplifier? [closed]
Why we are using coupling capacitor in AC amplifier?
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79
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Leakage current in capacitors & the resulting voltage drop
When capacitors are connected in series in a DC circuit, the voltage drop across individual capacitors at and immediately after the initial charging period is inversely proportional to the individual ...
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Do aluminum electrolytic capacitors expire?
Aluminum electrolytic capacitors are a type of capacitor that uses an electrolyte as one of the electrodes. The electrolyte is a liquid or gel that contains ions that conduct electricity. The ...
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Applying the equipartition theorem to charge on multiple capacitors
I asked this question here on the Electronics stack exchange, but it may be better suited here since the core of the question is about the application of the equipartition theorem to the charges and ...
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166
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How does a capacitor bottom plate get charged positive in DRAM?
So, I understand of the NMOS transistor work's here (at least I believe I do). Electrons are flowing towards the capacitor plate from the drain here. So, I don't get how the plate connected to the ...
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242
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Why capacitor is taking much longer time for charging than it would by calculation?
I was studying the charging time of capacitor in a simple seriee RC circuit, with series resistance of 10 M-Ohm & capacitor of 10 microFarad. According to calculations, the should store ~63% ...
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What could be the cause of a limit in the voltage supplied to a capacitor?
Recently I built a very basic 2-stage coil gun for a school project. Each coil was powered by an electrolytic capacitor. In order to charge the capacitor, the coil connected to an IGBT (insulated-gate ...
2
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What is the formula for ripple voltage in integrating circuit?
With a rectangular wave input Vin and a typical RC circuit with output taken across the capacitor, what is the formula to calculate Delta V due to ripple?
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412
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"Free" energy from Self-Charging capacitors?
Real world conundrum. I have an old Ac to DC variable Wall adapter. It can output 3v - 12v. It has one capacitor (1000mF 25V 85 Celsius) it also has "MW" which I think is the Mean Well ...
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What is an isolated system in capacitive circuit?
Does isolated system here means that the plates of capacitor need not be connected to terminals of a battery?
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What do capacitors actually do? [closed]
I’ve read answers on Quora about why capacitors are used, and they all pretty much said they store charge, or filter out specific frequencies. But what does that actually mean? What do you achieve by ...
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Why does a capacitor act as a frequency filter?
What is it about a capacitor which allows it to filter frequencies?
I understand the construction of a high-pass RC filter, and the mathematics behind it, but I'm struggling to find an explanation of ...
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